Welcome to the Speed world. Really fun cars. I've had my '07 for a long time, but just now getting into messing with it. I'm thinking pretty much like you. Pushing beyond 400hp might be fun, but well into the aux fuel land for that. I'll see what I can get out of my new CST4 setup. Just as soon as the shop finishes fiddling with it. I don't have any place I can work on it myself, unfortunately.
You going to use yours as a daily?